User Guide to ST8050
ST8050UG001 – User Guide
23
Revision 2.0
5.1.1.2 Sequence of events: Mobile Terminated–Short Burst Data message (MT-SBD)
1.
The message is sent to the Iridium Gateway server by the Value Added Reseller’s host server
via email or a DirectIP connection.
2.
Iridium Gateway SBD equipment receives the message and stores it in a database.
3.
Modem initiates a “Mailbox Check” either alone or in response to a Ring Alert, and the
message is downloaded to the modem.
4.
Modem sends an acknowledgement to the Iridium Gateway that the mobile-terminated-SBD
message has been delivered.
5.
Application extracts the mobile-terminated-SBD message from the modem and processes
the message.
5.2
GSM
The following services use the GSM network: FTP, SMS, TCP, UDP and SMTP/POP.